Quick answers
- Which hospitals does William S. Lefler work at?
- Medicare's official clinician data lists William S. Lefler at 3 hospitals: Banner Fort Collins Medical Center, Banner North Colorado Medical Center and Portneuf Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William S. Lefler see patients?
- Medicare's clinician data lists 3 practice locations, including Greeley, CO, Fort Collins, CO and Pocatello, ID. Call before your visit to confirm the address.
- What is William S. Lefler's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does William S. Lefler accept Medicare assignment?
- Yes. Medicare's clinician data says William S. Lefler accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for William S. Lefler?
- (970) 810-4593, as listed in official Medicare / NPI Registry data.
- What is William S. Lefler's NPI number?
- 1023235058. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William S. Lefler works
Medicare's Facility Affiliation Data lists William S. Lefler at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Banner Fort Collins Medical CenterFort Collins, CO · Acute Care Hospital · CCN 060126
- Banner North Colorado Medical CenterGreeley, CO · Acute Care Hospital · CCN 060001
- Portneuf Medical CenterPocatello, ID · Acute Care Hospital · CCN 130028
Practice locations
Addresses where William S. Lefler is enrolled with Medicare (CMS data updated 2026-10-02).
- 1801 16th StGreeley, CO 80631 (970) 810‑4593
- 4700 Lady Moon DrFort Collins, CO 80528 (910) 821‑4288
- 777 Hospital WayPocatello, ID 83201 (208) 239‑1720
Group practices
Medicare enrollment lists William S. Lefler as a member of these groups (CMS data updated 2026-10-02).
- Pocatello Health Services LLC175 clinicians in the group
- Banner Hospital Based Physicians Colorado LLC75 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Georgia School Of Medicine |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023235058 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians